<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    
        <input type="button" value="我是一个按钮"><br />
        <input type="text" placeholder="请输入昵称" name="userName"><br />
        <input type="radio" name="gender" value="1">男<br />
        <input type="radio" name="gender" value="2">女<br />
        <input type="radio" name="gender" value="0">保密<br />
        <input type="checkbox" name="" value="">篮球
        <input type="checkbox">排球
        <input type="checkbox">学习<br />

    <form action="hello.html">
        <input type="password" name="password" >
        <input type="submit" value="提交">
    </form>

    <select>
        <option>北京</option>
        <option>上海</option>
        <option selected="selected">西安</option>
    </select><br/>
    <textarea rows="10" cols="100">

    </textarea>
</body>

</html>